You probably don't have to replace a breaker, but you MAY have to reset one. They are on the circuit breaker panel in front of the converter. They are standard house circuit breakers.
You may also have a tripped ground fault breaker in one of the outlets in your trailer. You push the reset button to fix this. Look for outlets that have a "test" and "reset" button between the two plug receptacles.
Hi-Lo 1707T - Tire Minder TPMS on Tow Vehicle and Trailer, 300W Solar Battery Charger, Equal-i-zer WDH, Progressive Dynamics Converter, Fan-Tastic Fan, LiFePO4 battery 12V DC Electrical System
2014 F150 Platinum 4x4 3.5L EcoBoost SCrew